Answer: C. x-2
Step-by-step explanation:
We have the following expression:
Factoring in the numerator:
Factoring again in the numerator with common factor :
Simplifying:
Hence, the correct option is C. x-2
In a certain school,260 students were present on monday,270 on tuesday,280 on wednesday,and 250 on thursday find the average num
1 answer:
Answer:
The average number of students present are 265
Step-by-step explanation:
Given the number of students present on monday were 260, the number of students present on tuesday were 270 , the number of students present on wednesday were 280 , the number of students present on thursday are 250.
Now the numbers are 260, 270, 280, 250
We should basically find the average of these four observations
We know that the
sum of the observations is 260+270+280+250=1060
number of observations are 4
Average= =265
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Answer:
(a) The probability of having exactly four arrivals during a particular hour is 0.1754.
(b) The probability that at least 3 people arriving during a particular hour is 0.7350.
(c) The expected arrivals in a 45 minute period (0.75 hours) is 3.75 arrivals.
Step-by-step explanation:
(a) If the arrivals can be modeled by a Poisson process, with λ = 5/hr, the probability of having exactly four arrivals during a particular hour is:
The probability of having exactly four arrivals during a particular hour is 0.1754.
(b) The probability that at least 3 people arriving during a particular hour can be written as
Using
We get
The probability that at least 3 people arriving during a particular hour is 0.7350.
(c) The expected arrivals in a 45 minute period (0.75 hours) is